[FEATURE] Support IAM for connecting to Redshift

[Limess]

Is your feature request related to a problem? If yes, please describe.
I'd like to connect to Redshift via IAM to avoid having to manage credentials

Describe the solution you'd like
To be able to use an IAM jdbc URL: https://docs.aws.amazon.com/redshift/latest/mgmt/jdbc20-configure-authentication-ssl.html

Additional context
Currently an error is received when trying to use IAM in a connection URL:

com/amazonaws/services/redshift/AmazonRedshiftClientBuilder: java.lang.NoClassDefFoundError
java.lang.NoClassDefFoundError: com/amazonaws/services/redshift/AmazonRedshiftClientBuilder
	at com.amazon.redshift.core.IamHelper.setClusterCredentials(Unknown Source)
	at com.amazon.redshift.core.IamHelper.setIAMCredentials(Unknown Source)

[clklachu]

I have the exact same issue. Are there any workarounds?

[chngpe]

Closing ticket, @akuzin1 fixed the issue